
OEM Manufacturing • Precision Production • Global Export

Two facilities in Qingdao totalling 5,000 m², 75+ manufacturing and QC machines, and a design team with 15+ years of experience — delivering CNC machining, milling, turning, die casting and sheet metal parts to customers in 50+ countries.
Two facilities in Qingdao with room for CNC, QC and finishing under one roof.
Mazak 5-axis, CNC turning and milling, plus dedicated QC equipment on the floor.
Trusted by industrial buyers for repeat OEM runs and custom fastener programs.
Export-ready packaging, docs and logistics for global project delivery.
CNC, die casting, sheet metal, EDM and surface finishing from one supplier.
In-house engineering with DFM feedback and typical 24-hour quote response.
Browse our main fastener families — manufactured to international standards and available in custom specifications.
Hex, flange and specialty bolts engineered for industrial assemblies.
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Hex, lock and flange nuts matched to your bolt grades and finishes.
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Machine and self-tapping screws for precision fastening applications.
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Flat, spring and lock washers for load distribution and vibration control.
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Stud bolts and threaded rods for high-pressure and structural joints.
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Exotic alloys and coated fasteners built for harsh environments.
View DetailsMertra is a Qingdao-based OEM fastener manufacturer with two plants, 75+ machines, and engineering support for industrial buyers worldwide. We combine drawing-to-part manufacturing, multi-stage QC, and export-ready logistics so every shipment installs with confidence.
Trusted by industrial partners worldwide
Send us your drawing or part list and we’ll get back to you within one business day with a quote and lead-time estimate.